Metal-window construction



April 30, 1929. J. E. DENNIS METAL WINDOW CONSTRUCTION Filed April 27, 192

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Patented Apr. 30, 1929.

UNITED STATES JOHN EDWIN DENNIS, OF LONDON, ONTARIO, CANADA.

METAL-WINDOW CONSTRUCTION.

Application filed April 27, 1926. Serial No. 105,007.

The principal objects of the invention are to provide a metal window in which the joint between the sliding sash and the box frame is rendered air tight in a simple and inexpensive manner.

A further and important object is to obtain the maximum area of light opening.

The principal feature of the invention consists in the novel construction and arrangement of the box frame and the sash, whereby a flange of the sash structure engages in surface contact with the box frame and an angularly disposed flange extends into a slot in the box frame thereby forming a sliding scaled joint.

In the drawings, Figure 1 is a vertical mid-sectional view through a pair of sash and the sill and top portion of a window frame constructed in accordance with this invention.

Figure 2 is a cross sectional view through the frame and the upper and lower sash members.

Figure 3 a perspective view on a reduced scale of a portion of the casing and sash members.

Steel sash of numerous forms of cross section and box like metal frames of various forms have been in common use.

This invention contemplates the simplification of both the sash and frame structures in such a manner as to materially 1 en the cost and rmhzce the weight of the entire structure.

In the eonstrurtimi herein shown the window frame 1 formed in a substantially rectangular shape having a pair of vertical air-its 2 and I} therein.

A uur al strip 4 between the slots 2 and 3 is righlly ;-:upported by the flanged vertical stri p 5 which extends between the inner and outer side of the frame and forms it into two con ipartments.

1 ip 4 preferably formed with a ra ised rcr angular-shaped rib (1 against which the iuwa rd edge of the upper sash engages.

'lhe sidrs and top members of the upper u '7 and the sides and bottom members of the lower sash 8 are formed of a simple T bar section.

The web 9 of the side T bars fits in sliding contact with its flat fate against the inward face of the frame 1 and the flanged section 10 (attends into the vertical. slots 2 or 3 as the case may be.

The other flange '11 of the T head projects inwardly to form the support for the glass 12 which is held in position by the retaining strip 13.

The flanges 10 extending through the vertical slots in the frame form a direct stop to the inward flow of air past the sash and, while air may find its Way into the case throiilgh the freedom of the slot there is no direct outlet and the space within the frame forms a dead air space. There is of course freedom in the slot in the frame around the flange of the sash but as the web of the sash engages with a large area of contact of the surface of the frame, there is no free opening past the sash into the interior of the building.

The upper sash has a further obstruction to the passage of air therearound in the form of the rib 6 formed in the strip 4.

The lower end 14 of the strip 4 is formed without the spacing strip 6 and is simply a flat plate detachably secured to the strip 5 by suitable screws 15.

The sill 16 is formed with the shoulder 17 which engages the outer flange 10 of the sash and is also provided with a shoulder 18 which engages the inward edge of the web 9 of the sash.

The lower meeting rail of the upper sash is formed with a special structure of bar which is provided with a flange 19 which coincides with the flange 11 of the T bar sides and a web 20 coincides with the web 9.

The web 20 extends beyond the inward edge of the web 9 and is formed with a downturned flange 21 in which is formed a hori zontal groove 22. i

The top rail 2?, of the lower sash is formed with a flange 24 corresponding to the flange 11 of the side members and a horizontal extension flange 25 which is provided with a downturned outer edge flange 26 which extends into and engages in close fitting contact in the QI'i'lOVl. 22 in the horizontal sci tion of the upper sash.

A thoroughly air tight joint is provided in the meeting rails of the upper and lower sash.

It will be readily understood that a window structure as described is extremely simple. The number of parts are reduced to the minimum and the actual quantity of metal used is comparatively low,

lVhat I claim as my invention is A metal window construction comprising, a box, frame formed of a metal sheet bent into rectangular cross section with its longitudinal. edge portions turned inwardly and arranged in a common plane with the edges spaced apart, a metal strip arranged between and spaced from said spaced edges and having a raised rectangular-shaped rib extending longitudinally thereof, and a pair of sawh formed of T-section bars having their out ward flanges arranged between and in slidmg engagement with the spaced edges of: said box and strip and having the outward faces of the webs in sliding" surface contact with the inner face of the casing, said rectangular rih oi the metal strip engaging the inward edge of the sash in sliding contact.

JOHN EDVIN DENNIS. 

